Sphygmomanometer



FIG. 1 is a top plan view of a sphygmomanometer showing my new design;

FIG. 2 is a front elevation thereof;

FIG. 3 is a side elevation thereof;

FIG. 4 is a rear elevation thereof; and

FIG. 5 is a bottom plan view thereof.

The side opposite FIG. 3 is the mirror image thereof. 

The ornamental design for a sphygmomanometer, substantially as shown and described. 